add startup timeout

Author: giancarloromeo

packages/service-library/src/servicelib/fastapi/celery/app_server.py

@@ -9,6 +9,7 @@
 from ...celery.app_server import BaseAppServer
 from ...celery.task_manager import TaskManager
 
+_STARTUP_TIMEOUT: Final[float] = datetime.timedelta(minutes=5).total_seconds()
 _SHUTDOWN_TIMEOUT: Final[float] = datetime.timedelta(seconds=10).total_seconds()
 
 _logger = logging.getLogger(__name__)
@@ -27,7 +28,7 @@ async def run_until_shutdown(
     ) -> None:
         async with LifespanManager(
             self.app,
-            startup_timeout=None,  # waits for full app initialization (DB migrations, etc.)
+            startup_timeout=_STARTUP_TIMEOUT,
             shutdown_timeout=_SHUTDOWN_TIMEOUT,
         ):
             _logger.info("FastAPI initialized: %s", self.app)